CAPTCHA

This book will show:
 * 1) How to make a CAPTCHA
 * 2) Typical CAPTCHA usages

Chapters

 * /Why?/
 * /Usages/
 * /Integration/
 * Pre-made
 * Roll your own
 * The Anti-CAPTCHA
 * The Anti-CAPTCHA - Stronger
 * Images and PHP
 * Plugins
 * /Conclusion/